Distance and reddening of the Local Group dwarf irregular galaxy NGC 6822

Abstract

On the basis of a new photometric analysis of the Local Group dwarf irregular galaxy NCG 6822 based on observations obtained with the Advanced Camera for Surveys onboard the Hubble Space Telescope, we have obtained a new estimate of the extinction of two fields located in the southeast region of the galaxy. Because of significant differences in the distance estimates to NGC 6822 available in literature, we decided to provide an independent determination of the distance to this galaxy based on an updated and self-consistent theoretical calibration of the tip of the red giant branch brightness. As a result we newly determined the distance to NGC 6822 to be equal to ${(\mathrm{m}-\mathrm{M})}_0=23.54\pm 0.05$, and compared our measurement with the most recent determinations of this distance.

5 pages, 5 figures, Astronomy & Astrophysics (Research Note), in press (proof correction included)

References in corpus (7)

• Updated Electron-Conduction Opacities: The Impact on Low-Mass Stellar Models
• Comparison of Distances from RR Lyrae Stars, the Tip of the Red-Giant Branch and Classical Cepheids
• The Nature of Infrared Emission in the Local Group Dwarf Galaxy NGC 6822 As Revealed by Spitzer
• The AGB population of NGC 6822: distribution and the C/M ratio from JHK photometry
• The Cepheid distance to the Local Group Galaxy NGC 6822
• Spectra probing the number ratio of C- to M-type AGB stars in the NGC 6822 galaxy
• Allan Sandage and the Cosmic Expansion

Cited by in corpus (13)

• The Tip of the Red Giant Branch Distances to Type Ia Supernova Host Galaxies. IV. Color Dependence and Zero-Point Calibration
• A New Cepheid Distance Measurement and Method for NGC 6822
• Astrophysical Distance Scale II. Application of the JAGB Method: A Nearby Galaxy Sample
• Euclid: Early Release Observations -- Deep anatomy of nearby galaxies
• Carbon stars as standard candles: II. The median J magnitude as a distance indicator
• Ca II triplet spectroscopy of RGB stars in NGC 6822: kinematics and metallicities
• Carbon stars as standard candles -- III. Un-binned maximum likelihood fitting and comparison with TRGB estimations
• A state-of-the-art analysis of the dwarf irregular galaxy NGC 6822
• Euclid: Early Release Observations -- The star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822
• Consistencies and inconsistencies in redshift-independent distances
• Evidence for Photometric Contamination in Key Observations of Cepheids in the Benchmark Galaxy IC 1613
• The dwarf irregular galaxy NGC 6822. II. Young, intermediate and old stellar populations: comparison between theory and observations
• On the dwarf irregular galaxy NGC 6822. I. Young, intermediate and old stellar populations